To retaliate, take industrial action second (6,4)

I believe the answer is:

strike back

'to retaliate' is the definition.
('strike back' can be a synonym of 'retaliate')

'industrial action second' is the wordplay.
'industrial action' becomes 'strike' (workers going on strike).
'second' becomes 'back' (to second a motion is to back it).
'strike'+'back'='STRIKE BACK'

'take' is the link.

I've seen this clue in The Telegraph.

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